I finished all main/side missions and gigs, let Johnny take over whenever he wanted and then went through all reachable ending combinations (8 different endings

I finished all main/side missions and gigs, let Johnny take over whenever he wanted and then went through all reachable ending combinations (8 different endings, even if slightly) and then I learned there is a secret ending considered the best of them all which was denied to me due to some obscure choice early. So no wonder it left a sour taste.